Expansion shield with interlocking cap



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A TTORNE Y Patented Aug. 4, 1925.

UNITED smilies CHARLES c. ToMKINsoii, or rLAiNFIELD, New JERSEY, AssmN'oia` To ir. EDwARi) oGDEN, or MOUNTAINVILLE, NEW YORK,

EXPANSION SHIELD WITH INTER-LOCKING- CAP.

Original application filed February 23, 1921, Serial No. 447,292. Divided and this application filed October 15, 1923.

To all whom t may concern Be it known that I, CHARLES C. ToMKIN- soN, a citizen of the United States, and a resident of Plainfield, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Expansion Shields with Interlocking Caps, of which the following is a specification.

This invention relates to expansion shields such as are commonly anchored within bodies of solid material like concrete or masonry.

The invention relates particularly to a shield of the type set forth combined with a ceiling plate or cap and to the connection between these parts.

The invention has for its object to provide a form of interlocking connection between the expansion shield and cap or ceiling plate that will enable the parts to be brought into interlocking relation by relative rotatio-n about a common axis.

Further details ofthe invention will appear from the'following specification taken in connection with the drawing, which forms a part of this application, and in which Fig. 1 is a sectional elevation illustrating an expansion shield and cap in operative relation with respect to the object or wall within which the shield is inserted.

Fig. 2 is an elevational view of the shield shown in Fig. 1.

Fig. 3 is a sectional view taken substantially on line 3 3 of Fig. 1 and showing the cap or ceiling plate in plane.

Fig. 4 is a top plan view of the cap.

Fig. 5 is a transverse sectional elevation taken substantially on line 5,-5 of Fig. 6, and v Fig. 6 is a sectional elevation taken on the line 6-6 of Figure 3, showing the construction of the cap plate and the outer end of the shield.

This application is a division of application Serial No. 447,292 filed Feb. 23, 1921 and in this case the invention is illustrated Serial No. 668,779.

as embodied in a malleable or cast metal shield.

The invention briefly described consists of an expansion shield having an L-shaped groove therein and a ceiling plate or cap having projections adapted to be inserted in the groove and to interlock with the inner portion of the groove when one of the parts is rotated relative to the other.

Referring to the drawings, the shield illustrated comprises a pair of sections 10 and 11 adapted to be expanded by a. wedge member 12 having a threaded engagement with a screw bolt 13.

rlhe shield in this instance is formed of malleable or cast metal and has internal L- shaped grooves at its outer end or neck.

The cap plate or escutcheon plate 33 has hooked fingers 35 adapted to be received in the grooves and to retain the plate in engagement with the shield.

The cap or ceiling plate provides a iinished cover for the opening in which the shield is expanded thereby concealing the edges of this opening which are apt to be rough and unsightly. If desired, the ceiling plate may be ornamented.

Although one specific embodiment of the invention has been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims. f

What I claim is:

1. The combination in an expansion bolt of an expansion shield, the shield having a neck, an escutcheon plate, and means to connect the escutcheon plate with the interior of said neck.

2. In combination, an expansion shield having internal grooves therein and a ceiling plate having fingers adapted to extend into the shield and interlock with said grooves.

3. In combination, an expansion shield having internal, L-shaped grooves'therein and a ceiling plate having hooked ngers adapted to extend into the shield and interlock with said grooves.

4. In combination, `an expansion shield having internal grooves therein and a ceiling plate having fingers adapted to extend into the shield and interlock with said grooves, said fingers and grooves being so relatively constructed and arranged that the plate will be disposed fiush with the outer end of the shield when the plate is locked to the shield.

In Witness whereof, I have hereunto set 15 my hand this 8th day of October, 1923.

lVitness I. B. MooRE. 

